Hi there!
I luckily bumped into a massive legion of flourishers for the 2009 Dan and Dave lecture at Davenports, Where i met a lot of flourishers, and learned a lot of cool things. I noticed that during the day, i wasnt that bothered flourishing while walking or talking- cause they're doing the same thing, and i didnt feel rude, or felt like i was showing off. It was a good feeling.
saying that, There has been a couple of meetups, and each time- it has been quite savage, and i daresay- well worth the money spent just to get to london. There are people that come from wales even just for the day to join the jam
Anyways, You'll probably find more On dananddave.com about UK flourishers, most of the people i met are from there, and i usually just get notified if there's a jam somewhere in London.
I live in essex, which is quite near London.
Cheers!
-Sin